ASP全角半角互相转化函数

<%
Function DBC2SBC(Str, flag)
rem 全角半角转换函数
rem flag=-1时进行半角转全角
rem flag=0时进行半角全角互转
rem flag=1时进行全角转半角

Dim i, sStr
If Len(Str)<= 0 Then Exit Function
DBC2SBC = ""
For i = 1 To Len(Str)
sStr = Asc(Mid(Str, i, 1))
Select Case flag
Case -1
If sStr>0 And sStr<= 125 Then
DBC2SBC = DBC2SBC & Chr(Asc(Mid(Str, i, 1)) -23680)
Else
DBC2SBC = DBC2SBC & Mid(Str, i, 1)
End If
Case 0
If sStr>0 And sStr<= 125 Then
DBC2SBC = DBC2SBC & Chr(Asc(Mid(Str, i, 1)) -23680)
Else
DBC2SBC = DBC2SBC & Chr(Asc(Mid(Str, i, 1)) + 23680)
End If
Case 1
If sStr<0 Or sStr>125 Then
DBC2SBC = DBC2SBC & Chr(Asc(Mid(Str, i, 1)) + 23680)
Else
DBC2SBC = DBC2SBC & Mid(Str, i, 1)
End If
End Select
Next
End Function
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